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ARTHROPODS

ARTHROPODS. Kingdom – Animalia Phylum Arthropoda – “jointed foot” Sub phyla: Crustacea – crabs, crawfish, shrimp. ARTHROPODS. Kingdom – Animalia Phylum Arthropoda – “jointed foot” Sub phyla: Chelicerata – horseshoe crab, spiders. ARTHROPODS. Kingdom – Animalia

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ARTHROPODS

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  1. ARTHROPODS Kingdom – Animalia Phylum Arthropoda – “jointed foot” Sub phyla: Crustacea – crabs, crawfish, shrimp

  2. ARTHROPODS Kingdom – Animalia Phylum Arthropoda – “jointed foot” Sub phyla: Chelicerata – horseshoe crab, spiders

  3. ARTHROPODS Kingdom – Animalia Phylum Arthropoda – “jointed foot” Sub phyla: Uniramia – insects, centipedes, millipedes

  4. ARTHROPODS Kingdom – Animalia Phylum Arthropoda – “jointed foot” Sub phyla: Trilobita – ancestor of today’s arthropods extinct

  5. Basic Characteristics Segmented bodiesdivided into segments fused into 2 or 3 larger body regions

  6. Basic Characteristics Jointed appendages – for sensing, eating, reproduction, moving, defending

  7. Basic Characteristics Exoskeleton – outside skeleton • Made of chitin – type of carbohydrate • Hardened for protection • Limits the size because it has to molt to grow Bilateral symmetry

  8. Body systems • Nervous system • Ventral nerve cord and brain • Has ganglia in each segment • Most have compound eyes • Circulatory system • Open system – no vessels to enclose blood • Respiratory system • Gills in aquatic animals • Tracheal tubes in terrestrial animals

  9. crustaceans • Body regions - • Cephalothorax – head and thorax are fused • Most appendages are attached here • Covered by a hardened shell of chitin (carapace) • Abdomen – long, narrow tail region • Segmented • Have swimmerets

  10. crustaceans • Body systems • Respiratory • Feathery gills in the thorax – connected to walking legs to create water flow over the gills • Excretory • Green gland located in the head extracts nitrogenous wastes from the blood and maintains proper water and ion amounts in the body • Reproductive • Sexual • Eggs are fertilized as they pass through the gonopore • Swimmerets hold the fertilized eggs

  11. chelicerates • Body regions • Cephalothorax • Abdomen • Do not have sensory antennae like other arthropods • Most have simple eyes, not compound • All have appendages called chelicerae • Modified pincers or fangs for killing prey • Most are terrestrial except for the horseshoe crab • Have simple and compound eyes • Obtain oxygen through book gills • Includes the Class Arachnida – spiders, mites & ticks

  12. Uniramians • Includes insects, centipedes and millipedes • Have 3 body regions • Head • Thorax • Abdomen • Have compound eyes • Have malphigian tubules to excrete waste • Have tracheal tubes for respiration

  13. trilobita • Extinct ancestors to today’s arthropods

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